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IMPROVED APPARATUS FOR MANUFACTURNG SHEBT LEAD AND LEAD PIPE.

T0 ALL WHOM T MAY CONCERN:

Be it known that I, ANDREW DOW, of Brooklyn, New York, have invented an improvcd Machine foi Manufaeturing Sheet Lead and Lcad Pipe; and I do hcreby declare that tbe following is a full, clear, and exact description thereof, which will enable others slcilled in the art. to make and use the same, referencebeing had to the actzompanying drawings, forming part of this specification.

The object ofthis invention is to arrange a machine for making sheet lead, in such a manner that the same can be easily converted into a machine for making lead pipe.

A machine for making sheet lead was patented by John Robcrtson, on the 19th day of' September, 1865.

This machine is constructed on the Burr principle, that is to say, the pressure is applied to thelead, which is contained in an annuler vessel, from above, while my machine is constructed on the Leroy principle, according toavhich, the vessel containing the molten lead is moved up against the 6nd of a tube, fitting elosely in the annuler vessel. In either machine the lead is press edthrough a narrow annuler opening ont ofthe vessel, and is thus formcd into a pipe, whieh is afterwards to be eut open, and then flattcncd out, to make a sheet of required thickness and size. In Robertsons machine, the central rod can nevcr be remowied to eriable the machine to make lead pipes, as, When he removes the rod, the inner wall of his annuler watercylinder s removed. The large cylinder ivhich lie uses makes a geod close packing almost impossible, thereby impairing thc practicability of the machine. k

My machine overcomes all these difliculties, and does furthermore requirc less power thanthe other, and

can be easily converted into :1 machine for making lead pipe. In the annexed drawing my machine 25 completely illustrated- Figure 1 being a vertical central section of the same.

Figure 2 is a vertical central section et the same throughthe centre et the column C.

Figure 3 being a similar view, the machine being convcrted into a lead-pipe machine.

Similar lettcrs of reference indicate corresponding parts.

A represents the base or foundntion of the machine, which may be made of any suitablc material,and in any desired style. The Watcr-cylinder -block B is supported by four (more or less) columns or posts 0 C, whcl1 rcst upon the base, A. This cylindr-block B is provided with four (more or less) separatc cylinders, in which are arrangcd closc-fitting pistons D D. Watcr is ferbed into the lowcr end of the cylinders, andby lidrauli pressure the pistons are forccd up, carrying \Vith thcm a cross-bond, E, to uhich the central bolt F is sccured. The bolt F is adjustable up and clown by ineaiis of a mit, a, on top, and thus the thickness of the shoot lead is rcgulaiced by raising or lowcring the louer projecting head 6 of the boit in the inclined lower and of the cylin -dcr in the block G. To the stationary blocl B is furthcr sccured, by meaiis et screws or bolts, or otherwise, a

stationary cylindrical rem, I, which fits exactly the annuler operiing in the block G, uhcrein thc molten lead is contained. Thus by forcing the pistons D D up, as described, thc cross-bond E pulls up the boit F and block in an cqual manncr, and the lcad is thcreby gradually forced out of the annuler space in the block G, in the manner indicatcd in fig. 1, whcrcby thc shoot lcad is made by a very simple and complete method. By unscrewing thc nm. a, the central boit F may be rcmoved, and the machine can thon be transioiined into a lead-pipe machine. A cylindrical vesscl, K, is placed into the oponing in the blocl G, as sheu n in fig. 2, the bottom of snid vesscl bcing closcd. Within the saine, and in its centre, is arrangcd au npright pin, the diameter of i\'hiCh may be incrcaserl at will, by laying rings of the desircd thickness round the saine. The rani I is also removed from tbe block B, and a tube, L, securcd in its place, the inner dinmeter of which corresponds with the centre opening in the bl0Cli B, tbrongh which the bolt E did fit. The enter diameter of the tube L corresponds with the inner diameter of the vessel K, and so, when the said vessel is fillcd with molten lcad, and the block G is forced up by the pressure et the water under the pistons D, a pipe will be formed and foreed np through the central opening in the black B, as indicated in fig. 2. The diametcr of the core 0 in K, regulatcs thc inn-cr diameter of the pipe, While the outer diamcter of thc saine is to be the inner one of the tube L and central opening in B, which may also be decreased at will. sa mach lcss power is reqnired for the formation of the lcad pipe, that I can dispense with two of' the pistonsD for that purpose, npplying hydraulidpressure te tue only.

I claim as new, and desire to sccurc by Lctters Patent- 1. The combination et the waLer-cylimlcr block B, poste 0, piston, D, cross-heud E having central boit F,

bearing head 6, cylindrical tain I, and annular blocli G, all constructcd as dcscribed, for thc purpose specificd. 2. The combination ofthe wnter-cylindcr block B, tube L, vcsscl K having core 0, and annuler block G, constructed as described, forthe purpose specified.

. ANDREW DOW.

Witncsses:

WM. F. McNAMAnA, ALEX. F. ROBERTS. 

